I know there is nothing preventing me from publishing an article in a different research field, but is it beneficial other than for satisfying my own interest/curiosity? Presumably these may be added to my CV, and possibly included for funding applications?
This is an interesting question. I recently was interviewed for a job and one of the interviewers asked me about a couple of papers which were clearly outside of my field of specialization. She wanted to know 'what these papers say about me and my professional capacity'. I was not prepared... and I said something along the lines of that ... I observe everything and try to identify problems and give solutions, even in a field that I am not directly studying... which, by the way, is my true reason to venture outside of my field. Now, looking at some of the responses maybe I was not wrong to go out of my field and produce some publications.